Your browser doesn't support javascript.
loading
Whole cell & culture filtrate proteins from prevalent genotypes of Mycobacterium tuberculosis provoke better antibody & T cell response than laboratory strain H37Rv.
Article in English | IMSEAR | ID: sea-140271
ABSTRACT
Background &

objectives:

The immune responses to different antigens of Mycobacterium tuberculosis H37Rv vary from patient to patient with tuberculosis (TB). Therefore, significant difference might be documented between the H37Rv with long histories of passages and recent clinical isolates of M. tuberculosis. In the present study, immune response of TB patients and healthy controls against 39 clinical M. tuberculosis isolates was correlated with laboratory strain H37Rv.

Methods:

The antibody response was studied coating whole cell extracts and culture filtrate proteins of M. tuberculosis isolates and laboratory strain H37Rv by enzyme linked immunosorbent assay (ELISA). Lymphoproliferation was studied by incorporation of tritiated thymidine and cytokines (IFN-γ and IL-4) by using commercially available kits.

Results:

Sero-reactivity to whole cell extract (WCE) of 11 clinical isolates was higher with pooled serum and individual's serum from tuberculosis patients showed significant reactivity (P<0.05) to ten of these isolates using ELISA. Of the WCE of 39 clinical isolates, 10 were found to be potent inducer of lymphoproliferation as well as cytokine secretion (P<0.05) in peripheral blood mononuclear cells from PPD+ healthy controls. Six culture filtrate proteins (CFPs) from these selected clinical isolates were also better inducers of antibody and T-cell response. Interpretation &

conclusion:

Overall, our results revealed that the clinical isolates belonging to prevalent genotypes; CAS1_Del (ST-26), East African-Indian (ST-11) and Beijing family (ST-1) induced better antibody and T cell responses compared to H37Rv laboratory strain. Further studies need to be done to purify and identify the dominant protein (s) using whole cell extract and culture filtrates from these immunologically relevant clinical M. tuberculosis isolates, which will be worthwhile to find out pathogenic factors, potential diagnostic markers and protective molecules for tuberculosis.
Subject(s)

Full text: Available Index: IMSEAR (South-East Asia) Main subject: Humans / Filtration / Immunity, Cellular / Antibody Formation / Mycobacterium tuberculosis Type of study: Prognostic study Language: English Year: 2012 Type: Article

Similar

MEDLINE

...
LILACS

LIS

Full text: Available Index: IMSEAR (South-East Asia) Main subject: Humans / Filtration / Immunity, Cellular / Antibody Formation / Mycobacterium tuberculosis Type of study: Prognostic study Language: English Year: 2012 Type: Article